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A265155
as a simple table
n
a(n)
1
1
2
2
3
4
4
8
5
10
6
11
7
14
8
15
9
16
10
17
11
18
12
19
13
21
14
22
15
23
[1,2,4,8,10,11,14,15,16,17,18,19,21,22,23]